ES2347199T3 - KITCHEN DEVICE FOR DOMESTIC USE. - Google Patents

Abstract

The kitchen equipment has a drive side input shaft (4) and a drive side output shaft (36), where a work tool is mounted in a stationary and torque proof manner at the output shaft automatically or at coupling parts (49,50). Units (62,38) are formed at the work tool and at gear device (1), by which the proper gear speed is selected for the work tool during mounting of a work tool.

Description

Kitchen device for home use.

The invention relates to a device of kitchen for domestic use according to the preamble of claim one.

From DE-1846736U and DE-3307023A1, the devices of kitchen for domestic use, in this case, manual beaters, which they have on the driven side at least two output shafts that rotate at different turning speeds and are equipped with devices coupling in different ways. In this way, it is possible introduce different tools in the different devices of coupling, so that at all times it is only possible insert the fitting element of the tool that is adapted to a specific coupling device in the device corresponding coupling of the corresponding output shaft, while the other coupling device is designed to a different tool that is equipped with a lace element different. Through this provision, it is possible to operate different tools at different turning speeds by A single drive unit. For example, a dough hook must be driven at a lower speed than a whisk or the blade of a manual whisk accessory.

Finally, of EP-1039825B1 is known a kitchen device of the type described at the beginning. A gear that can work with two stages of transmission is designed between the input tree and the output tree. For change the transmission stage, the operator must activate a displacement device arranged in the housing. For the therefore, the operator must always decide the speed of rotation of the gear that will be necessary to drive the tools determined. This can lead to malfunction, with the result that food products are not optimally processed.

The object of the invention now consists of improve a kitchen device so that the device itself Always apply the proper turning speed for respective tools, without any participation by the operator. In this way, the device can be carried out through simple and profitable means.

According to the invention, this object is reached by the specific characteristics of claim 1. Thanks to the fact that, according to the invention, means are formed in the tool and in the gear through which the proper transmission stage for a tool when the tool is mounted, now the operator does not need more than simply connect the tools provided to process the food specific to the kitchen device. When the gear of the invention is used, for example, with a manual whisk, a dough hook or whisk that rotates at a lower speed could be used now instead of the high mixing rod speed, so that the lowest transmission stage is geared in this way automatically. If, for example, a mixer is used manual, in this case it is possible to use two tools simultaneously, however, only one of them must be responsible for the transmission change. However the drive can also be activated by both tools, or can be activated only when both identical tools have reached its proper mounting position in the mixer manual.

The means to adjust the gear can be, for example, optical, magnetic, electrical or strictly mechanics It is only important that during the insertion of a tool the appropriate transmission stage is geared for the given tool For example, when optical media are used, The degree of reflection from the tool to the detector can be evaluated by an evaluation circuit, which thus emits a electrical signal corresponding to a controlled actuator electrically, so that the proper transmission stage is meshed later. For example, when media are used magnetic or electric, also in this case, these impulses are aimed at an electrically controlled actuator, which selects in turn the appropriate transmission stage corresponding to the tool application.

According to the characteristics of the claim 2, a planetary gear train, which on the one hand can support high turning speeds and high torques and on the other hand too allows to obtain high transmission ratios, it is used as gear. This embodiment is based on the gear described in EP-1039825B1, in which the means comprise the minus a top surface formed in the crown and a contact surface formed on the tool. In this arrangement, the different tools have surfaces of contact that are separated differently from their devices of stationary coupling, designed in the form of slots annular, so that, in one case, the mounting of a tool planned for the first stage of transmission does not make your contact surface perform an axial displacement of the crown, while, in the other case, mounting a tool planned for the second stage of transmission makes its contact surface carries out an axial displacement of the crown through the stop surface. In this way, the stage Proper gear transmission for tools suitable is selected by especially simple means, Simply assembling those tools. The gear is shaped as a planetary gear train comprising the minus one satellite rotatably supported on a satellite carrier, a planet geared to the latter and a crown geared to the satellite, where the satellite is meshed on one side to the tree of entrance and on the other hand is rotatably connected to the tree of output through the satellite carrier, where the satellite and the crown they have at least two gear wheels of different diameter for change the rotation speed of the output shaft, being disengaged the first pair of gear wheels of said wheels of gear while the other pair of gear wheels are geared when the crown is displaced axially with respect to the satelite.

According to the characteristics of the claim 3, the crown is axially movable in the housing through a guide arrangement and is also rotatably fixed. From this way, in the starting position, the crown fits with its edge of larger diameter gear on satellites that have the largest diameter and, after axial displacement of the crown led to out, introducing a corresponding tool, the crown is axially displaced far enough so that the edge of smaller diameter crown gear snaps into the satellites which, similarly, have a smaller diameter gear edge.  In this way, the gear setting changes from the first to the Second stage of transmission. The direction of axial displacement It is almost parallel to the central axis of the gear train planetary and is also parallel to the central axes of the tools

The characteristics of claim 4 they serve to make the crown axially movable in the housing and be rotatably fixed. The guide layout includes guides sliders that are distributed for this purpose around the outer periphery of the crown, said guides being covered sliding through grooves formed in the housing. For the therefore, the guide arrangement constitutes a block guide sliding, so that the crown is concentrically guided with with respect to the planetary gear train.

Advantageously, the sliding guides and the slots extend parallel to the axes of the satellites (claim 5) and to the central axis of the gear train planetary, to prevent transverse forces from occurring in the gear and for the pairs to be transmitted with the greatest effectiveness.

According to the characteristics of the claim 6, the crown is driven by a spring arrangement that is prestressed between the casing and the crown. Spring arrangement has the objective that the crown always moves to a first stage of transmission provided that no tool in the gear or when the tool is mounted Suitable for use in the first stage of transmission. Thus,  the spring arrangement is formed by compression springs evenly separated around the periphery, which are supported between the end of the crown drive side and in the housing or in a stationary part of the device kitchen.

The fact that two gear edges are conformed in the crown, being firmly fixed an edge of their ring-shaped gear to the crown by fixing means, while the other gear edge is a integral part of the crown itself, allows a production Especially simple crown. For example, it is possible first mold the crown with the gear edge integrated into an injection mold, while at the same time it is formed the second gear edge regardless of the same in another mold below. The second gear edge it can then be introduced into the crown and fixed in its position, for example, by glue, screwed or some other fixing medium

According to claim 8, a fixation advantageous of the gear edge to be introduced into the crown consists in which the fixing means are formed on the one hand by wall elements that protrude radially in the ring and that they fit into grooves that extend into the crown and, on the other hand, consist of spring hooks arranged in the crown that fit elastically behind the gear edge after the same It has been introduced into the crown. During the assembly process of the gear edge, protruding wall elements fit together in the grooves formed in the crown and then the spring hooks snap into position at extreme surfaces of the gear edge in the axial position appropriate, so that the gear edge is fixedly connected and Rotating to the crown. Therefore, this gear edge it can also absorb the transmitted pairs from the unit of drive through the input shaft and transmit them to the crown without it starting to spin or without moving in axial direction during this process.

With the features of claim 9, a gear is now obtained in which the output shaft of the it joins an additional transmission stage in which, instead of a single tool, now it is possible to mount two tools next to each other. Such gear is especially suitable. for manual mixers or other kitchen devices that can Run with two tools simultaneously. In this arrangement, the output shaft is geared to a first wheel cogwheel that is part of a second cogwheel which, in turn, It is geared to a third gear wheel. The second and third cogwheels are each provided with an element of coupling in which a tool can be mounted on each case. To avoid more detailed explanations in this context, refers to the manual mixer of the M 800 series, which has been marketed by the applicant for many years, in which a additional transmission stage with a first, second and third Cogwheels joins the gear and, similarly, the tools are mounted on the coupling elements arranged in the second and third gear wheels.

Additionally, the transmission stage located below allows the central axes of the second and third gear wheels are arranged in such a way that remain adjacent to the top surfaces of the crown, which they are formed in arms that extend radially towards inside and that, therefore, can come into contact with contact surfaces arranged in the tools. Due to the dual nature of the forces acting on the tools in the two opposite stop surfaces of the crown are avoided tilt movements in the crown guide arrangement, thus allowing a particularly smooth change between gears without significant effort.

The characteristics of claim 10 they serve to allow a particularly free movement of inclinations of the crown by the tools. With this realization, cantilever arms are arranged in the crown that they extend upwards, to the level of the tools, of so that the contact surfaces of the tools can even exert pressure on the crown stop surfaces. The contact surfaces of the tools are formed by free rod-shaped ends of tools. By therefore, the tools that must move the crown against the spring forces until the second transmission stage they should only be designed with a rod length that extends from its fixation point somewhat higher than those in those who do not want the displacement of the crown.

In the drawings an embodiment of the invention, and will be explained in more detail below. In the drawings,

Fig. 1 shows a perspective view of a three-stage gear of a kitchen device according to the invention, however, without the housing of the kitchen device which houses the gear and without the crown reset device shown in Fig. 5, in which the crown is partially shown cut on the right front to facilitate the view of the satellites, and in which the third stage of transmission is connected to a pair of cogwheels that house two tools (shown only partially), where, in this case, those mounted tools leave the gear in its starting position, especially in the first stage of transmission,

Fig. 2 shows a side view, perpendicular to the front part of the gear according to Fig. 1, no However, with the additional representation of the trajectory of the lines of force for the first stage of transmission,

Fig. 3 shows an illustration corresponding to Fig. 1, however, in this case, with different tools mounted on the pair of sprockets, of so that the second stage of transmission has now been in Granada,

Fig. 4 shows a side view, perpendicular to the front part of the gear according to Fig. 3, no However, with the additional representation of the trajectory of the lines of force for the second stage of transmission,

Fig. 5 shows a partial sectional view in perspective of the planetary gear train from two stages to higher scale, in which the crown is partially cut again in the front to facilitate the view of the satellites, and in which a reset device for moving the crown is also shown to its starting position and the housing of the kitchen device It is only outlined, and

Fig. 6 shows an exploded view of the gear according to Fig. 1, however, also with the device restart and only with one tool, represented only partially.

According to Figs. 1 to 4 and 6, the device kitchen comprises a gear 1 fixedly mounted in a housing 17 (only Fig. 5) and composed of a gear train 2 planetary and a 3-stage transmission 3 (only Figs. 1 to 4 and 6) arranged next to gear train 2 planetary. The planetary gear train 2 has a tree 4 of centrally extending entry that has its free end top a gear element 5 that serves to couple the shaft 4 input to a drive shaft of a motor electric drive (not shown) arranged on train 2 of planetary gears The other free end of the input tree 4 it has a cogwheel 6 that is geared to three satellites 7 that They are evenly distributed around the periphery.

According to Fig. 6, satellites 7 are equipped of some trees 8 that are fixed at the top to about support bushes 10 formed in a metal ring 9 and by the lower part of support points 12 formed in a satellite carrier 11. Satellites 7 can rotate freely around trees 8. The satellite carrier 11 is designed practically disk-shaped at the bottom, at whose base support points 12 are arranged. On the periphery, enter the individual support points 12 extend upwards three poles 13 equidistant apart around the periphery, and are provided at their free ends with pins 14 integrally formed in posts 13. In ring 9 of metal, between the support bushes 10, are formed about holes 15 into which the fittings penetrate precisely pins 14, which are widened at the top, by example, by hot forming or pressing, so that the metal ring 9 is fixedly attached to the satellite holder 11, fixing the satellites 7 in their trees 8 to the portal satellites 11. However, it is also possible for pins 14 are pressed into the holes 15 by means of a socket pressure, which can also be carried out in this way stable fixation of ring 9 to the satellite holder 11. Preferably, the satellite carrier 11 is plastic molded by injection.

Of course, according to Figs. 1 to 6, tree 4 input is mounted and centered by the tree part 16 of the same in the housing 17 (only partially outlined in Fig. 5) through a support point that is not shown in the drawings. For example, the housing 17 may be the housing of a manual mixer, a manual whisk or other kitchen appliance, to which it is possible to adapt at least two tools of different operation for different operations of food processing.

According to Figs. 1 to 6, satellites 7 are geared to a crown 18 on whose inner wall, in the part upper, a gear edge 19 with a diameter is arranged larger while a gear edge 20 consisting of a ring is fixed to the crown 18 through means of fixing 21 at the bottom. The fixing means 21 they consist of wall elements 22 that project radially towards out from the gear edge 20 and that fit the grooves 23, which are open from its bottom, at the edge of gear 20 (Fig. 6), so that they cannot rotate with with respect thereto, and are fixedly attached to the crown 18 a through spring hooks 24 arranged in crown 18 which they fit on the front surface 25 of the wall elements 22 by below.

For simplicity, the provision of guidance 26 formed on the outer periphery of the crown, which can clearly seen in a partial view, preferably in the Fig. 5, has not been shown in Figs. 1 to 4. The provision of guide 26 according to Fig. 5 comprises sliding guides 27 in shape rectangle evenly around the periphery of the outer surface of the crown 18, inside the which sliding bars 28 in the form of a hammer head that protruding from the housing 17 inside the hole 29 fit through longitudinal grooves 73 formed in the guides sliders 27, on the outside thereof. The disposition of guide 26 can have any shape, but it always works according to the key and slot or drawer principle, and can also be designed according to the principle of a dovetail guide, as in this case. It is only important that, after insertion of the gear 1, the crown 18 is axially movable without leading to put out a lot of force to move it from the first to the Second stage of transmission. On the one hand, the satellite carrier 11 it is axially fixed by the shaft part 16 and, on the other side, by means of a bushing 34 of the housing 17, through support points (not shown). The center line 30 of tree 4 of entrance is also at the same time the central line of train 2 of planetary gears

In Figs. 1 to 6, satellites 7, which are designed in one piece and preferably molded in plastic, they comprise two gear edges 31, 32 arranged one behind the another, where the upper gear edge 31 has a further diameter larger than the lower gear edge 32. The gear edge top 31 gear with top gear edge 19 formed in crown 18 and, in the second stage of transmission, the lower gear edge 32 gears with the gear edge lower 20 formed in the crown 18.

According to Figs. 1 to 6, a central cavity 33 with a flange extends from the bottom of the holder satellites 11, being fixed to said cavity 33 with a wheel flange toothed 35 through a socket 34, so that it cannot rotate with respect to it. Therefore, the cogwheel 35 is connected to the satellite holder 11 with a non-positive socket and forms the output shaft 36 of the planetary gear train 2. In Fig. 5, the gearwheel 35 is not shown; neither is represented the transmission 3 of a stage shown in Figs. 1 to 4 and 6. For example, the gearwheel 35 can be fixed to the bushing 34 by a toothed, but it can also be introduced under pressure, join by glue or otherwise connect to bushing 34 of such that it cannot rotate with respect to it. For example, him bushing 34 can be snapped into cavity 33 with recess and join by glue or weld by ultrasound or connect from another way to it so that it cannot rotate with respect to the same. The satellite carrier 11 is rotatably mounted and fixed axially in the housing 17 through the outer surface of the socket 34.

In Figs. 5 and 6 two opposite arms 37 radially, on which butt surfaces are formed 38 facing down, extending downward from the front surface 25 below the gear edge 20. The buffer surfaces 38 are surrounded by an annular wall 39 that it serves to guide the free ends of the tools 40, 41; 68, 69, represented only partially in Figs. 1 to 4 and 6.

According to Fig. 5, at the top, about centering pins 42 that protrude upward are conformed in the crown 18, in which some are centered coil springs 43. In the installed state of rod 1 of the gear in the housing 17, the coil springs 43 are actuated by extreme stops (not shown) arranged in the housing 17, such that the coil springs 43 move the crown 18 under pre-tension until the first transmission stage shown in Figs. 1, 2 and 5. The four coil springs 40 are arranged evenly distributed around the periphery of the crown 18 and are guided radially so additional inside 46 of the housing 17 from the inside and from the outside using semicircular wall elements 45 arranged on the outer periphery 44 of the crown 18 and which extend along the central axis 30.

According to Figs. 1 to 4 and 6, the cogwheel 35, designed as the output shaft 36, is geared to a wheel gear 47 which is connected through a front gear 48 to a coupling element 49 so that it cannot rotate with with respect to it and which, in turn, is geared to an element 50 of coupling. The two coupling elements 49, 50 have in its outer periphery toothed 51, 52 and, therefore, also they form cogwheels that are meshed together. A tree 53, 54 extends upward from elements 49, 50 of coupling in each case, being formed at the free end top thereof coupling elements 55, 56. The tree 54 of the left coupling element 49 extends far enough to a central hole 57 formed in the gearwheel 47 for coupling element 56, barely visible from above in hole 57, according to Fig. 6.

The coupling elements 55, 56 are formed by individual elastic tabs 70 that are distributed around the periphery and have hooks of closure 58 facing inward, so that its ends, when mount a tool 40, fit elastically into the annular groove 59 formed at the free end of the tool 40. At the same time, the drive elements 61 located so diametrically opposite in the upper tree 60, fit in a toothed (not shown) formed on the inner wall (not shown) of the hole (not shown) of the coupling elements 49, 50. In this way, the tools are connected to the elements 49, 50 coupling so that they cannot rotate with respect to they are also fixed against falls in the elements 49, 50 coupling through locking hooks 58. In this point, reference is made again to manual mixers of the M 800 series, which have been marketed by the applicant for many years, in which a single-stage satellite is already used with a one-stage transmission arranged below, such as It is described herein.

According to Figs. 1 to 4 and 6, the free end of tools 40, 41; 68, 69 forms a contact surface 62 in each case, in the tools 40, 41 that have a larger distance (Figs. 3 and 4) from the annular groove 59 to contact surface 62, exerts pressure on the stop surface 38, so that the crown 18 is displaced upwards and the gear edges 32 of the satellites 7 are engaged to the lower gear edge 20, while the gear edges 31 of the satellites 7 are disengaged from the edge of top gear 19. In tools 68, 69 for which the first transmission stage is intended to remain engaged, the distances b (Figs. 1 and 2) from the annular groove 59 to the contact surfaces 62 have a sufficiently small dimension so that there is no displacement of the crown 18 and, therefore, the crown 18 remains in the first transmission stage in which it is in Figs. 1, 2 and 5. Therefore, dimension a is large enough to change the planetary gear train 2 from the first to the second transmission, this path being completed only after the closing hook 58 has been snapped in. in the respective annular groove 59.

Preferably, it is only possible for tools 40, 41; 68, 69 with identical distances a or b can be mounted on the coupling elements, that is, only two dough hooks or two beaters can be used at the same time. This prevents a dough hook manufactured for a lower turning speed and a whisk suitable for a high turning speed from working together at high speed at the same time, which could damage the device and also cause injury.

Therefore, the invention makes it possible for the first time, with the aid of predefined distances a , b , at the time of mounting the tools 40, 41; 68, 69 in the coupling elements 55, 56, automatically changing the transmission stage that is advantageous for those tools 40, 41. When the tools 40, 41 with the dimension b are mounted, there is no displacement of the crown 18 and, therefore, the first transmission stage remains engaged. According to Fig. 5, this happens because the coil springs 43 push the crown 18 down under pre-tension and, therefore, the gear edge 31 always remains engaged to the upper gear edge 19. According to Fig. 5, only when tools 40, 41 having the dimension a are mounted, the crown 18 is pushed up against the force of the coil springs 43 in the X direction, and the gear edge 32 meshes with the gear edge 20, while the edge of gear 31 enters the free space 63 formed between the two gear edges 19, 20 and, therefore, is disengaged. Depending on the way in which the individual gear edges 31, 32 and 19, 20 are designed respectively in their diameters, a multiplier gear or a reduction gear is formed.

Additionally, Figs. 2 and 4 show, in principle, the trajectories of lines of force 64, 65 through of cogwheels and individual trees. Fig. 2 shows the trajectory of the lines of force 64 for the first stage of transmission, and Fig. 4 shows the trajectory of the line of force 65 for the second stage of transmission. Arrow 71 shown in the input tree 4 in Figs. 1 to 4, same as arrows 66, 67 shown at the exit in tools 40, 41, show the input and output of the moment of force or torque, is that is, the pair 68 introduced is divided into pairs 66, 67 into the output tools 40, 41.

Of course, the sprockets 47, 49, 50 they are mounted on bearings formed in the housing 17 which, however, they have not been represented in the drawings.

The dimension b from the annular groove 59 to the front surface 62 is selected large enough that there is a small air gap between the contact surface 62 and the abutment surface 38, or so that the contact surface 62 is barely supported against the stop surface 38, but so that the crown 18, according to Figs. 1 to 6, do not be moved up by it. In this arrangement, the free ends of the tools 68, 69 are guided centrally within the annular walls 39.

Claims (10)

1. A kitchen device for operating various tools (40, 41; 68, 69) for processing food, especially for electrically operated kitchen devices, such as beaters, food processors or automatic mixers, with an input shaft (4) of the drive side and an output shaft (36) of the driven side, between which a gear (1) is arranged, in a housing (17), which changes the revolutions of the output shaft (36), being at least capable a tool (40, 41), by means of interconnected coupling elements (55, 56, 61), if introduced, fixed in position and fixed against rotation, and / or removed from the output shaft itself (36) or at least a coupling part (49, 50) that rotatably fits in the output shaft (36), characterized in that means (distance a, 62, 38, 27, 28, 15, 19, 20, 31, 32) are arranged in the tool (40, 41) and in the gear (1), by means of which, when an h is introduced tool (40, 41), the correct transmission stage for the tool (40, 41) is selected. 2. The cooking device according to claim 1, characterized in that the gear (1) comprises a planetary transmission (2) and the means comprise at least one stop face (38), arranged in a crown (18), and a contact face (62), arranged in the tool (40, 41; 68, 69), as well as other tools (40, 41; 68, 69), which have contact faces (62) spaced apart (distance to or b) of its coupling elements (59) fixed positionally. 3. The cooking device according to claim 2, characterized in that the crown (18) is mounted by means of a guide arrangement (26) in the housing (17) parallel to the central axis (30) of the planetary transmission (2), so that it can move in axial direction but is fixed against rotation. The kitchen device according to claim 3, characterized in that the guide arrangement (26) comprises sliding guides (27) distributed on the outer perimeter of the crown (18) and sliding bars (28) on the inner wall (29 ) of the housing (17), and because the sliding bars (28) cover the sliding guides (27) and fit into them. The cooking device according to claim 4, characterized in that the sliding guides (27) and the sliding bars (28) extend parallel to the central axis (30) of the planetary transmission (2). The kitchen device according to claim 3, characterized in that the crown (18) is actuated by a spring arrangement (43) prestressed between the housing (17) and the crown (18). 7. The cooking device according to claim 2, characterized in that at least one toothed ring (20) is arranged in the crown (18), formed as a single ring part, which is firmly fixed to the crown (18) by fasteners (23, 37; 24, 25). The kitchen device according to claim 7, characterized in that the fixing elements (23, 37; 24, 25) are formed from wall elements (22) projecting radially from the toothed ring (20), which they fit into grooves (23) that extend into the crown (18) and comprise spring hooks (24) arranged in the crown (18) that fit behind the toothed ring (20) after insertion into the crown (18). 9. The cooking device according to claim 2, characterized in that the output shaft (36) meshes with a first gear wheel (47), whereby the first gear wheel (47) is permanently connected to a second gear wheel (49 ), because the second gear wheel (49) meshes with a third gear wheel (50) and why a coupling element (55) is disposed on each of the second and third gear wheels (49, 50), and can be coupled to each of them a tool (40, 41; 68, 69), fixed in position and fixed against rotation. 10. The cooking device according to claim 9, characterized in that two arms (37) are arranged diametrically opposite each other in the crown (18) and that the contact faces (62) of the tools (40, 41 ) are aligned adjacent to the stop faces (38).